/*
 *
 *  * Copyright 2015-2101 Shouqi Limousine & chauffeur Group.
 *  *
 *  * Licensed under the Apache License, Version 2.0 (the "License");
 *  * you may not use this file except in compliance with the License.
 *  * You may obtain a copy of the License at
 *  *
 *  *      http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS,
 *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  * See the License for the specific language governing permissions and
 *  * limitations under the License.
 *
 */

package com.sq.plugin.redis.serializer.util;


import com.sq.plugin.redis.serializer.exception.SerializationException;

import java.nio.charset.Charset;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author cooper
 */
public class SerializationUtils {

    private SerializationUtils() {
    }

    private static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    public static final byte[] EMPTY_ARRAY = new byte[0];

    public static final Map<byte[], byte[]> EMPTY_MAP = new ConcurrentHashMap<>();

    public static boolean isEmpty(byte[] data) {
        return (data == null || data.length == 0);
    }

    public static byte[] encode(String str) {
        if (str == null) {
            return SerializationUtils.EMPTY_ARRAY;
        }

        try {
            return str.getBytes(DEFAULT_CHARSET);
        } catch (Exception e) {
            throw new SerializationException("Could not write String: " + e.getMessage(), e);
        }
    }
}
